Both trading platforms are popular amongst Forex brokers. MT4 was built by Metaquotes, has been around for the longest and remains the most popular amongst traders. MT5 is a newer version of MT4 but is yet to become popular.
Each of the trading platforms we offer is different and we recommend that you try demos of all of them to see which one best suits your trading style. The user interface, advanced take profit and stop-loss systems, detachable charts, varying chart time frames, live sentiment and depth of market displayed by default are among the key differences.
There is also a vast range of custom indicators and EA readily available for MT4.